Moving Flame flameless candles for outdoor use are constructed of plastic, so they won't melt in summer sun or crack in winter cold. They feature mini-holes in the bottom of the candle to drain away moisture. These Outdoor Pillars are available in 5-inch, 7-inch and 9-inch heights. Several colors to choose from, all unscented. You can use Outdoor Flameless Candles year-round, on patios and decks, boat docks, in candle lanterns and for lining walkways and staircases. The candles use two "D" batteries and have five-hour timers. Most of outdoor candles are now REMOTE READY, just purchase the optional remote control.